A made up name for marketing, if you are looking for collector grade you need to get specific info about a specific sks, our CTC had supergrade and I looked at them all, claimed they were non refurb, at least 2 out of 5 were refurb, easy to see, the others were a mess! So , if they were non refurb, they were fairly heavily used! CTC got theirs from North Sylva and North Sylva decided which were Super de duper grade, it is a crock! I picked out 7 rifles from regular grade that were far superior to the super slam duper grade! If you insist on super grade then ask the seller what it has and get lots of pics!
Do you know why you could pick through the basic ones and find better ones than the so called super duper ones ?? it's because you are an expert . you have done you research and you know your stuff . it's like being a Doctor . your either a hack or one that the patients want to hang onto .